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Full text of "The manufacture and properties of iron and steel"

404
METALLURGY OF IRON AND STEEL.
place; one or two fractures were homogeneous, but they showed the coarse crystallization that follows overheating.
The lap welds represent the method used in making pipe, and are a better criterion of the welding quality of the steel than the round pieces, for in making the union the pieces were simply laid together with no upsetting. All of this steel, both Bessemer and open-hearth, had been pronounced suitable for pipe, although it
TABLE XIX-A. Tensile Tests on Welded Bars of Steel and Wrought-Iron.
Figures In parentheses indicate that the bar broke in the weld.  N=natural bar; "W—welded bar.  * denotes that elongation is measured in 2 inches.
Kind ot steel.	Conditions of test-	Composition; per cent.					2Sr=natural. W= welded.	Elastic limit; pounds per square inch.	Ultimate strength; pounds per square inch.	Elongation in 8 inches ; per cent.	Bedaction of area; per cent.	Name of smith.
		C.	Mn.	P.	S.	Cu.						
Acid 0   H. forging	IffS *Sr*	.20	.89	.089	.03	.85	N W w w w	466TO 45890 45580	70450 (60940 (55000 (40840 (42190	26.25 *10.00 *9.00 •7.00 *8.00	68.50 19.78 7.66 8.12 4.04	A B 0 P
												
												
												
												
Acid Bess, forging	AX • 8cr«« Sg«| ^2 *	.25	1.30	.083	.05	.85	N W w w w	56140 56750	86600 68810) 55020) 62060) 41930)	22.25 *4.00 *6.00 *6.00 •8.00	B6.40 29.20 0.78 0.50 2.10	"A" B 0 P
												
												
												
												
Acid 0   H. soft.	S'Sp/o •2 §3® i! * Ss>*	.00	.40	.08		.85	N W w w w	40980 88230 44660 45030	60680 61060 60380 65610 (26640)	80.00 *66.88 *86.00 '•12,00'	63.20 66.61 68.60 56.28 4.68	'A' B o p
												
												
												
												
Acid 0. H. BOft.	o'ga-o .3 3,2 "3 *S *	.09	.39	.070		.85	N W w w w	88940 87550 87400 40010 89220	56900 67650 (42740) (43910) 68790	28.76 *89.00 *9.00 *10.50 •34.00	69.89 62.18 13.48 14.65 62.29	"A" B 0 p
												
												
												
												
Acid O   H. soft.	Iflf *B *	.09	.40	.08		.85	N W w w "W	41670 83740 88300 84460	66300 (89490) (80550) 63880 60020	80.00 *6.00 •7.00 •87.00 *16.00	02.66 8.68 10.79 05.46 28.22	'A' B 0 p i
												
												
												
												
Basic O. H. soft.	!!>! *8 *	.06	.55	.019		055	N W w w w	83880 87660 85370 81820	61760 68650 (80640) (51850) 49690	82.75 •82.00 •8.00 •27.00 *41.00	05.85 69.65 18.88 40.77 67.85	'A' B c p
												
												
												
Basic 0. H. soft.	OXI rya 3gS1 *8 ^	.00	.80	.014		.35	N W w •w w	82580 41030 85470 88280 89720	48090 64580 62100 64200 65110	81.75 •86.00 •89.00 '•41.00	71.66 66.68 70.81 72.81 70.61	"A* B 0 P